CN110305469A - A kind of polyamide compoiste material and its preparation method and application for gas assisted molding - Google Patents
A kind of polyamide compoiste material and its preparation method and application for gas assisted molding Download PDFInfo
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- CN110305469A CN110305469A CN201910447431.5A CN201910447431A CN110305469A CN 110305469 A CN110305469 A CN 110305469A CN 201910447431 A CN201910447431 A CN 201910447431A CN 110305469 A CN110305469 A CN 110305469A
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- polyamide compoiste
- gas assisted
- assisted molding
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
Abstract
The invention discloses a kind of polyamide compoiste materials for gas assisted molding, are based on 100% by total weight, raw material composition includes: 50%~70% nylon 6；20%~40% bat wool；0%~5% glass microballoon；0%~5% high flowing copolymer polyamide resin；0.01%~2% heat stabilizer；0.1%~2% processing aid；0%~2% pigment.The invention also discloses the preparation methods of the polyamide compoiste material described in one kind, can be realized using existing equipment double screw extruder, and easily operated and implementation is easy to industrialization large-scale production, has wide application prospect.Polyamide compoiste material of the invention can be used for the gas assisted molding product more demanding to appearance glossiness, such as automobile door handle, which solves the problems, such as that the injection occurred during composite material gas-assistance injection molding is discontented and appearance gloss reduces.
Description
Technical field
The present invention relates to polyamide compoiste material technical fields, and in particular to a kind of polyamide for gas assisted molding is compound
Material and its preparation method and application.
Background technique
Plastic part has many advantages, such as that design space is big, processing cost is low, highly polished, anti-corrosion, while weight is golden
Belonging to significantly reduces, and largely uses in Hyundai Motor industry, is the important directions of energy-saving and emission-reduction.Not with injection molding technology
Disconnected development, various novel injection molding technologies gradually mature, and wherein gas assisted molding technology uses more and more common, which can guarantee
The weight that plastic part is further decreased under the premise of product requirement is widely used, gas in some automotive plastic workpieces
Body assisted injection molding process is that the deficient material injection of resin is carried out into die cavity first, and then the nitrogen Jing Guo high pressure compressed is led
Enter in fused materials, gas flows to the low pressure and high-temperature area of product along resistance minimum direction.When gas flows in product
When dynamic, it empties thicker wall cross-sectional by replacing fused materials.The rest part of these materials cemented out filling product.When
After filling process is completed, is continued to provide dwell pressure by gas, the contraction of ejecting product or warpage issues are minimized.It has
Have the advantages that injection pressure is low, product buckling deformation is small and the biggish product of wall thickness variation easy to process.
Polyamide is commonly called as nylon, is linear thermoplastic's polymerization on molecular backbone containing amide group constitutional repeating unit
Object has the good characteristics such as tough wear-resisting, endurance, oil resistant, nontoxic, is the irreplaceable high-performance engineering modeling of automobile industry
Material still due to nylon big amide group containing polarized, causes it to have the shortcomings that being easy water suction leads to strength reduction, therefore
Require to enhance it under normal circumstances, anti-aging it is modified, to improve its intensity and heat aging property, meet various tight
Requirement under severe environmental condition.
Due to the addition of reinforcing filler and other auxiliary agents, enhancing modified nylon composite materials product generally can all occurs
The problems such as appearance glossiness reduces, especially when injection molding is formed using gas-assisted injection molding technology, due to its unique injection work
Skill, injection time is longer, and injection pressure, dwell pressure are low, therefore it is easy to appear injections when producing the product of certain structures
Discontented and product appearance glossiness difference situation.
The Chinese invention patent application of Publication No. CN 101191012A (application No. is 200610118665.5) discloses
A kind of high glaze, Gao Liudong long glass fiber-reinforced polyamide composite material and its manufacturing method, the material is by 70%~40%
By the star-like polyamide resin of modification for carrying out reactive extrursion preparation using double screw extruder to existing linear polyamidoamine resin
The long glass fibres that the mode parallel with particle length of rouge melt impregnation 30%~60% arranges is made.The star-like polyamides of modification
Polyimide resin contains the component of following weight percent: polyamide 94%~99%,-four -1- of 1,4-Diaminobutane-N, N '
Propyl amine 0.05%~5% and heat stabilizer 0.1~2%.The technical solution is come by the modified star-like polyamide of addition
The mechanical property of material is improved, to overcome prior art band while improving glass-fiber-reinforced polyamide product mechanical property
The apparent mass for carrying out material is poor, injection property difference technical problem.Although the mobility for improving material can improve molding
The problem of poor appearance of product, but in the auxiliary production process of practical gas, material flowability is better, more holds in the auxiliary gas replenishment process of gas
Easily there is situation about blowing brokenly, can not be made so as to cause product, this is especially tight in the complicated product production process of product
Weight.
Summary of the invention
For shortcoming existing for this field, the present invention provides a kind of polyamide composite woods for gas assisted molding
Material solves the problems such as injection occurred during composite material gas-assistance injection molding is discontented and appearance gloss reduces.
A kind of polyamide compoiste material for gas assisted molding is based on 100% by total weight, and raw material composition includes:
6 relative viscosity of nylon is 3.0~3.4, and further preferred relative viscosity is 3.2.The higher nylon of viscosity
Entanglement between molecule and molecule is more, therefore has good melt strength, is conducive to improve inflation pressure in gas assisted molding
Power without being blown brokenly, meanwhile, the mechanical properties such as viscous impact strength of nylon of height are more preferable than the nylon of low viscosity, especially low temperature
Impact property, in addition to this, since molecular weight is larger, the entanglement between molecule is more, the crystallization rate phase of highly viscous nylon
To relatively slowly, this is also beneficial to appearance when injection molding.Higher viscosity also can form differences in viscosity with the nylon copolymer resins of height flowing.
But when molecular weight is excessively high, the mobile performance of material is too poor, not can guarantee normal injection processing.
The bat wool is at least one of alkali-free glass fibre, carbon fiber, acicular wollastonite, preferably surface
, diameter 10~15 μm of alkali-free glass fibre processed by the silane coupling agent containing amino, glass fibre cost performance is high,
Good enhancing can be played to the performance of nylon 6, reach the balance of dispersibility with mechanical property.
The glass microballoon is alkali-free glass microballon, and partial size is 20~30 μm, and the silane coupled of amino is contained on surface
Agent is modified.By the alkali-free glass microballon of the silane coupler modified mistake containing amino, can be good at and nylon resin matrix
Dispersion combines, little to Effect on Mechanical Properties under a small amount of additive amount.At the same time, since glass microballoon is in injection process
In tend in the lower component of viscosity assemble, and the lower component of viscosity can be enriched in article surface in injection process,
So glass microballoon can form " rolling " effect, flow resistance of the melt in mold is reduced, to improvement appearance glossiness
Play advantageous effect.
The high flowing copolymer polyamide resin is caprolactam and hexamethylene diamine/adipic acid copolymer nylon (6/ nylon of nylon
66 copolymer nylons), it is 190~195 DEG C of fusing point, 100~150g/10min of melt index under the conditions of 200 DEG C/1.2kg, further excellent
It is selected as 150g/10min.Such 6/ nylon66 fiber copolymer nylon of nylon has lower crystallization temperature, and there are part phases with nylon 6
Hold, and biggish differences in viscosity can be formed with highly viscous nylon 6, article surface is readily migrate into injection process, with glass
Glass microballon forms synergistic effect, the lower resin-rich layer of content of glass fiber is formed, to greatly improve the lustrous surface of product
Degree.
The heat stabilizer is alkali halide, and the alkali halide is cuprous iodide, stannous chloride, iodine
Change at least one of potassium, potassium bromide, further preferably, the heat stabilizer is the cuprous iodide and iodine by mass ratio 1:8
The mixture of change potassium composition, the heat stabilizer of such proportion, thermostabilization efficiency are best.
The processing aid is fatty acid calcium salt, and further preferably, the processing aid is calcium stearate, Neng Gouti
The processing performance of high material.
The pigment is inorganic pigment, and at least one of carbon black, titanium dioxide, iron oxide, Ke Yigen specifically may be selected
According to color require carry out using.
Preferably, being the polyamide compoiste material for gas assisted molding based on 100%, raw material group by total weight
At including:
Polyamide compoiste material under above-mentioned raw materials composition ratio is more suitable for gas assisted molding, and product appearance glossiness is more
It is excellent, improve production efficiency and qualification rate.
The present invention also provides the preparation methods of the polyamide compoiste material for gas assisted molding described in one kind, comprising:
Twin-screw extrusion is added from main feed hopper after mixing in raw material in addition to bat wool and glass microballoon
In machine, bat wool and glass microballoon are added twin-screw extrude from side feed hopper, squeezed out through double screw extruder
Afterwards by water cooling, pelletizing and drying, the polyamide compoiste material for gas assisted molding is obtained.
Blender can be used and mix the raw material in addition to bat wool and glass microballoon.
The blender selects high-speed mixer commonly used in the art, and generally optional revolving speed is 2000~4000rpm
The high-speed mixer of (rev/min), the time generally mixed with are 0.5~1.5min.The i.e. described uniformly mixed condition be
0.5~1.5min is mixed in 2000~4000 revs/min.
The temperature setting of first temperature section of the double screw extruder from feed zone to head to the 8th temperature section divides
Not Wei 255~265 DEG C, 260~270 DEG C, 260~265 DEG C, 250~260 DEG C, 240~250 DEG C, 230~240 DEG C, 230~
235 DEG C, 220~230 DEG C, the temperature of die head are 230~240 DEG C.
The present invention also provides the polyamide compoiste materials for gas assisted molding described in one kind in gas-assistance injection molding system
Application in standby hollow plastic product, preferably prepares the application in automobile door handle product in gas-assistance injection molding, such product
Surface needs to paint, very high to appearance glossiness requirement, while structure is complicated for product, requires the auxiliary processing technology of gas high.
Compared with prior art, the present invention major advantage includes:
(1) polyamide compoiste material of the present invention, using high visocity nylon 6 material, by being added to high flowing nylon copolymerization
Resin, glass microballoon etc. are guaranteeing that material mechanical performance is gentle using material respectively characteristic and mutual synergistic effect
Under auxiliary processing performance, the gloss for enhancing the products appearance of modified composite material is substantially improved, production efficiency and conjunction are improved
Lattice rate.
(2) preparation method of polyamide compoiste material of the present invention can be realized, easily using existing equipment double screw extruder
In operation and implement, is easy to industrialization large-scale production, has wide application prospect.
(3) polyamide compoiste material of the present invention can prepare various hollow plastic products by gas-assistance injection molding, especially suitable
It closes and automobile door handle is prepared using gas-assistance injection molding, the automobile door handle excellent in mechanical performance of preparation, appearance glossiness is good, matter
Amount preferably, is conducive to market-oriented large-scale promotion application.
Specific embodiment
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In the following examples, the experimental methods for specific conditions are not specified, usually according to conventional strip
Part, or according to the normal condition proposed by manufacturer.
Embodiment 1
Polyamide compoiste material uses the raw material of following weight percent:
58% nylon 6 (newly meeting U.S.A reaches, trade mark M3200, the nylon 6 that relative viscosity is 3.2), 30% bat wool (nothing
Alkali containing glass fibre 435N, Mount Taishan glass factory, the alkali-free glass fibre using surface Jing Guo silane coupler modified mistake, fibre diameter
Be 10~15 μm), 5% glass microballoon (050-20-215 France Sovitec), 5% high flowing copolymer polyamide resin (melt index
150g/10min, 200 DEG C/1.2kg, Zhuzhou epoch green wood), 0.2% heat stabilizer (the leading HS02 in the U.S., by mass ratio 1:8's
The mixture of cuprous iodide and potassium iodide composition), 0.8% processing aid (calcium stearate), 1% pigment (black masterbatch 3785, card
Bo Te company).
Nylon 6, Gao Liudong copolymer polyamide resin, heat stabilizer, processing aid and pigment are added in high-speed mixer
It is added twin-screw extrude after 3000rpm mixing 1min from main feed hopper, by bat wool and glass microballoon from side feed
Material hopper adds twin-screw extrude, and by water cooling, pelletizing and drying after double screw extruder squeezes out, it is multiple to obtain polyamide
Condensation material.
The temperature of first temperature section of the double screw extruder from feed zone to head to the 8th temperature section, which is set, is respectively
265 DEG C, 270 DEG C, 265 DEG C, 260 DEG C, 250 DEG C, 240 DEG C, 235 DEG C, 230 DEG C, the temperature of die head are 240 DEG C.
Embodiment 2
Polyamide compoiste material uses the raw material of following weight percent:
63% nylon 6 (newly meeting U.S.A reaches, trade mark M3200, the nylon 6 that relative viscosity is 3.2), 30% bat wool (nothing
Alkali containing glass fibre 435N, Mount Taishan glass factory, the alkali-free glass fibre using surface Jing Guo silane coupler modified mistake, fibre diameter
Be 10~15 μm), 5% glass microballoon (050-20-215 France Sovitec), 0.2% heat stabilizer (the leading HS02 in the U.S., by
The mixture of cuprous iodide and the potassium iodide composition of mass ratio 1:8), 0.8% processing aid (calcium stearate), 1% pigment it is (black
Color masterbatch 3785, Cabot Co., Ltd).
By nylon 6, heat stabilizer, processing aid and pigment be added in high-speed mixer after 3000rpm mixing 1min from
Main feed hopper adds twin-screw extrude, and twin-screw extrusion is added from side feed hopper in bat wool and glass microballoon
In machine, by water cooling, pelletizing and drying after double screw extruder squeezes out, polyamide compoiste material is obtained.
The temperature of first temperature section of the double screw extruder from feed zone to head to the 8th temperature section, which is set, is respectively
265 DEG C, 270 DEG C, 265 DEG C, 260 DEG C, 250 DEG C, 240 DEG C, 235 DEG C, 230 DEG C, the temperature of die head are 240 DEG C.
Embodiment 3
Polyamide compoiste material uses the raw material of following weight percent:
63% nylon 6 (newly meeting U.S.A reaches, trade mark M3200, the nylon 6 that relative viscosity is 3.2), 30% bat wool (nothing
Alkali containing glass fibre 435N, Mount Taishan glass factory, the alkali-free glass fibre using surface Jing Guo silane coupler modified mistake, fibre diameter
Be 10~15 μm), (melt index 150g/10min, 200 DEG C/1.2kg, the Zhuzhou epoch are new for 5% high flowing copolymer polyamide resin
Material), 0.2% heat stabilizer (the leading HS02 in the U.S., the mixture being made of the cuprous iodide and potassium iodide of mass ratio 1:8),
0.8% processing aid (calcium stearate), 1% pigment (black masterbatch 3785, Cabot Co., Ltd).
Nylon 6, Gao Liudong copolymer polyamide resin, heat stabilizer, processing aid and pigment are added in high-speed mixer
It is added twin-screw extrude after 3000rpm mixing 1min from main feed hopper, bat wool is added from side feed hopper
In double screw extruder, by water cooling, pelletizing and drying after double screw extruder squeezes out, polyamide compoiste material is obtained.
The temperature of first temperature section of the double screw extruder from feed zone to head to the 8th temperature section, which is set, is respectively
265 DEG C, 270 DEG C, 265 DEG C, 260 DEG C, 250 DEG C, 240 DEG C, 235 DEG C, 230 DEG C, the temperature of die head are 240 DEG C.
Comparative example 1
Polyamide compoiste material uses the raw material of following weight percent:
68% nylon 6 (newly meeting U.S.A reaches, trade mark M3200, the nylon 6 that relative viscosity is 3.2), 30% bat wool (nothing
Alkali containing glass fibre 435N, Mount Taishan glass factory, the alkali-free glass fibre using surface Jing Guo silane coupler modified mistake, fibre diameter
Be 10~15 μm), (the leading HS02 in the U.S. is made of mixed 0.2% heat stabilizer the cuprous iodide and potassium iodide of mass ratio 1:8
Close object), 0.8% processing aid (calcium stearate), 1% pigment (black masterbatch 3785, Cabot Co., Ltd).
By nylon 6, heat stabilizer, processing aid and pigment be added in high-speed mixer after 3000rpm mixing 1min from
Main feed hopper adds twin-screw extrude, and bat wool is added twin-screw extrude from side feed hopper, through double
By water cooling, pelletizing and drying after screw extruder extrusion, polyamide compoiste material is obtained.
The temperature of first temperature section of the double screw extruder from feed zone to head to the 8th temperature section, which is set, is respectively
265 DEG C, 270 DEG C, 265 DEG C, 260 DEG C, 250 DEG C, 240 DEG C, 235 DEG C, 230 DEG C, the temperature of die head are 240 DEG C.
Comparative example 2
Polyamide compoiste material uses the raw material of following weight percent:
58% nylon 6 (newly meeting U.S.A reaches, trade mark M2800, the nylon 6 that relative viscosity is 2.8), 30% bat wool (nothing
Alkali containing glass fibre 435N, Mount Taishan glass factory, the alkali-free glass fibre using surface Jing Guo silane coupler modified mistake, fibre diameter
Be 10~15 μm), 5% glass microballoon (050-20-215 France Sovitec), 5% high flowing copolymer polyamide resin (melt index
150g/10min, 200 DEG C/1.2kg, Zhuzhou epoch green wood), 0.2% heat stabilizer (the leading HS02 in the U.S., by mass ratio 1:8's
The mixture of cuprous iodide and potassium iodide composition), 0.8% processing aid (calcium stearate), 1% pigment (black masterbatch 3785, card
Bo Te company).
Nylon 6, Gao Liudong copolymer polyamide resin, heat stabilizer, processing aid and pigment are added in high-speed mixer
It is added twin-screw extrude after 3000rpm mixing 1min from main feed hopper, by bat wool and glass microballoon from side feed
Material hopper adds twin-screw extrude, and by water cooling, pelletizing and drying after double screw extruder squeezes out, it is multiple to obtain polyamide
Condensation material.
The temperature of first temperature section of the double screw extruder from feed zone to head to the 8th temperature section, which is set, is respectively
265 DEG C, 270 DEG C, 265 DEG C, 260 DEG C, 250 DEG C, 240 DEG C, 235 DEG C, 230 DEG C, the temperature of die head are 240 DEG C.
Comparative example 3
Polyamide compoiste material uses the raw material of following weight percent:
58% nylon 6 (newly meeting U.S.A reaches, trade mark M2400, the nylon 6 that relative viscosity is 2.4), 30% bat wool (nothing
Alkali containing glass fibre 435N, Mount Taishan glass factory, the alkali-free glass fibre using surface Jing Guo silane coupler modified mistake, fibre diameter
Be 10~15 μm), 5% glass microballoon (050-20-215 France Sovitec), 5% high flowing copolymer polyamide resin (melt index
150g/10min, 200 DEG C/1.2kg, Zhuzhou epoch green wood), 0.2% heat stabilizer (the leading HS02 in the U.S., by mass ratio 1:8's
The mixture of cuprous iodide and potassium iodide composition), 0.8% processing aid (calcium stearate), 1% pigment (black masterbatch 3785, card
Bo Te company).
Nylon 6, Gao Liudong copolymer polyamide resin, heat stabilizer, processing aid and pigment are added in high-speed mixer
It is added twin-screw extrude after 3000rpm mixing 1min from main feed hopper, by bat wool and glass microballoon from side feed
Material hopper adds twin-screw extrude, and by water cooling, pelletizing and drying after double screw extruder squeezes out, it is multiple to obtain polyamide
Condensation material.
The temperature of first temperature section of the double screw extruder from feed zone to head to the 8th temperature section, which is set, is respectively
265 DEG C, 270 DEG C, 265 DEG C, 260 DEG C, 250 DEG C, 240 DEG C, 235 DEG C, 230 DEG C, the temperature of die head are 240 DEG C.
Comparative example 4
Polyamide compoiste material uses the raw material of following weight percent:
58% nylon 6 (newly meeting U.S.A reaches, trade mark M3200, the nylon 6 that relative viscosity is 3.2), 30% bat wool (nothing
Alkali containing glass fibre 435N, Mount Taishan glass factory, the alkali-free glass fibre using surface Jing Guo silane coupler modified mistake, fibre diameter
Be 10~15 μm), 5% glass microballoon (050-20-215 France Sovitec), 5% copolymer polyamide resin (melt index 70g/
10min, 200 DEG C/1.2kg, Zhuzhou epoch green wood), 0.2% heat stabilizer (the leading HS02 in the U.S., by the iodate of mass ratio 1:8
The mixture of cuprous and potassium iodide composition), 0.8% processing aid (calcium stearate), 1% pigment (black masterbatch 3785, Cabot
Company).
Nylon 6, Gao Liudong copolymer polyamide resin, heat stabilizer, processing aid and pigment are added in high-speed mixer
It is added twin-screw extrude after 3000rpm mixing 1min from main feed hopper, by bat wool and glass microballoon from side feed
Material hopper adds twin-screw extrude, and by water cooling, pelletizing and drying after double screw extruder squeezes out, it is multiple to obtain polyamide
Condensation material.
The temperature of first temperature section of the double screw extruder from feed zone to head to the 8th temperature section, which is set, is respectively
265 DEG C, 270 DEG C, 265 DEG C, 260 DEG C, 250 DEG C, 240 DEG C, 235 DEG C, 230 DEG C, the temperature of die head are 240 DEG C.
Polyamide compoiste material prepared by Examples 1 to 3 and comparative example 1~4 is to survey by injector processing and forming
Testing bar has carried out mechanical property contrasting detection, and has been processed as automobile door handle product by injector gas assisted molding, and comparison adds
Whether work normal, appearance glossiness, and the results are shown in Table 1.
The mechanical property and appearance contrasting detection result of each test bars of table 1
It can be seen that in the PA6 system of 3.2 viscosity from the experimental result of table 1, add specific high flowing copolymer resins
It can illustrate that form certain differences in viscosity is more advantageous to the collaboration played between material with the apparent synergistic effect of glass microballoon output
Effect, under the premise of guaranteeing mechanical property, glossiness substantially improves polyamide compoiste material of the present invention, improves products appearance
Gloss improves production efficiency and qualification rate.
In addition, it should also be understood that, those skilled in the art can be to this hair after having read foregoing description content of the invention
Bright to make various changes or modifications, these equivalent forms also fall within the scope of the appended claims of the present application.
Claims (10)
1. a kind of polyamide compoiste material for gas assisted molding, which is characterized in that by total weight be 100% based on, raw material composition
Include:
2. the polyamide compoiste material according to claim 1 for gas assisted molding, which is characterized in that the nylon 6
Relative viscosity is 3.0~3.4.
3. the polyamide compoiste material according to claim 1 for gas assisted molding, which is characterized in that the threadiness
Filler is at least one of alkali-free glass fibre, carbon fiber, acicular wollastonite.
4. the polyamide compoiste material according to claim 1 for gas assisted molding, which is characterized in that the glass is micro-
Pearl is alkali-free glass microballon, and partial size is 20~30 μm, and the silane coupler modified of amino is contained on surface.
5. the polyamide compoiste material according to claim 1 for gas assisted molding, which is characterized in that the high flowing
Copolymer polyamide resin is caprolactam and hexamethylene diamine/adipic acid copolymer nylon, 190~195 DEG C of fusing point, 200 DEG C/1.2kg condition
100~150g/10min of lower melt index.
6. the polyamide compoiste material according to claim 1 for gas assisted molding, which is characterized in that the thermostabilization
Agent is at least one of cuprous iodide, stannous chloride, potassium iodide, potassium bromide.
7. the polyamide compoiste material according to claim 1 for gas assisted molding, which is characterized in that the processing helps
Agent is fatty acid calcium salt.
8. being used for the polyamide compoiste material of gas assisted molding described in any claim according to claim 1~7, feature exists
In being that raw material forms based on 100% by total weight includes:
9. the system described in a kind of any claim according to claim 1~8 for the polyamide compoiste material of gas assisted molding
Preparation Method, comprising:
Raw material in addition to bat wool and glass microballoon is added twin-screw extrude from main feed hopper after mixing,
Bat wool and glass microballoon are added twin-screw extrude from side feed hopper, after double screw extruder squeezes out by
Water cooling, pelletizing and drying obtain the polyamide compoiste material for gas assisted molding.
10. the polyamide compoiste material described in a kind of any claim according to claim 1~8 for gas assisted molding is in gas
Auxiliary injection moulding prepares the application in hollow plastic product.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111621144A (en) * | 2020-05-18 | 2020-09-04 | 中广核俊尔(浙江)新材料有限公司 | Calcium chloride-resistant nylon composite material and preparation method thereof |
| CN112552676A (en) * | 2020-12-11 | 2021-03-26 | 天津金发新材料有限公司 | Polyamide composite material capable of being formed in gas-assisted mode |
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| CN112552676A (en) * | 2020-12-11 | 2021-03-26 | 天津金发新材料有限公司 | Polyamide composite material capable of being formed in gas-assisted mode |
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